// -*- C -*-

h=2;

$fa=1;
$fs=0.1;

spc= 7;
l = 50;
w = 10;

difference(){
  union(){
    cube([l,w,h], center=true);
  }

  for (i=[0:2:10]) {

    sz = 3 + 0.5 * i/10;

    echo(sz);
    translate([(i-5)/2 * spc, 0, -spc ])
      cylinder(r= sz/2, h=14);
  }
}